To manage your Togo RV Plus subscription, first go to the home screen of the Togo RV app and click on the user image in the top right corner:
You should now be on your Account settings screen.
From this screen, click "Manage Subscription" underneath Togo RV Plus.
You should now see the Manage Subscription screen. Underneath "Billed via" you will see how your subscription is currently billed. You can update or cancel your subscription by clicking that "Billed via" button.